attachement storage migration failed (locally to WebDav migration)

im trying to migrate my attachment from a local drive to a webDav server
the migration failed due to this error exception

ERROR [Attachment data migration task] [pages.persistence.dao.WebDavAttachmentDao] saveNewAttachment Failed to save attachment successfully:
– url: /admin/doattachmentmigration.action | userName: admin | action: doattachmentmigration
org.apache.commons.httpclient.ProtocolException: Unbuffered entity enclosing request can not be repeated.
at org.apache.commons.httpclient.methods.EntityEnclosingMethod.writeRequestBody(EntityEnclosingMethod.java:483)
at org.apache.commons.httpclient.HttpMethodBase.writeRequest(HttpMethodBase.java:1973)
at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:993)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:397)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:170)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:324)
at org.apache.webdav.lib.WebdavResource.putMethod(WebdavResource.java:2700)
at com.atlassian.confluence.pages.persistence.dao.WebDavAttachmentDao.put(WebDavAttachmentDao.java:668)
at com.atlassian.confluence.pages.persistence.dao.WebDavAttachmentDao.saveNewAttachment(WebDavAttachmentDao.java:260)
at com.atlassian.confluence.pages.DefaultAttachmentManager.saveNewAttachment(DefaultAttachmentManager.java:53)
at com.atlassian.confluence.pages.AbstractAttachmentManager.saveAttachment(AbstractAttachmentManager.java:84)
at com.atlassian.confluence.pages.persistence.dao.GeneralAttachmentCopier.copy(GeneralAttachmentCopier.java:150)
at com.atlassian.confluence.pages.persistence.dao.GeneralAttachmentMigrator.migrate(GeneralAttachmentMigrator.java:25)
at com.atlassian.confluence.util.longrunning.AttachmentMigrationLongRunningTask$1.doInTransactionWithoutResult(AttachmentMigrationLongRunningTask.java:71)
at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:33)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:127)
at com.atlassian.confluence.util.longrunning.AttachmentMigrationLongRunningTask.runInternal(AttachmentMigrationLongRunningTask.java:66)
at com.atlassian.confluence.util.longrunning.ConfluenceAbstractLongRunningTask.run(ConfluenceAbstractLongRunningTask.java:21)
at java.lang.Thread.run(Thread.java:595)
2009-01-26 16:49:37,108 ERROR [Attachment data migration task] [pages.persistence.dao.WebDavAttachmentDao] saveNewAttachment Failed to save attachment successfully:
– url: /admin/doattachmentmigration.action | userName: admin | action: doattachmentmigration
org.apache.commons.httpclient.ProtocolException: Unbuffered entity enclosing request can not be repeated.
at org.apache.commons.httpclient.methods.EntityEnclosingMethod.writeRequestBody(EntityEnclosingMethod.java:483)
at org.apache.commons.httpclient.HttpMethodBase.writeRequest(HttpMethodBase.java:1973)
at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:993)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:397)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:170)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:324)
at org.apache.webdav.lib.WebdavResource.putMethod(WebdavResource.java:2700)
at com.atlassian.confluence.pages.persistence.dao.WebDavAttachmentDao.put(WebDavAttachmentDao.java:668)
at com.atlassian.confluence.pages.persistence.dao.WebDavAttachmentDao.saveNewAttachment(WebDavAttachmentDao.java:260)
at com.atlassian.confluence.pages.DefaultAttachmentManager.saveNewAttachment(DefaultAttachmentManager.java:53)
at com.atlassian.confluence.pages.AbstractAttachmentManager.saveAttachment(AbstractAttachmentManager.java:84)
at com.atlassian.confluence.pages.persistence.dao.GeneralAttachmentCopier.copy(GeneralAttachmentCopier.java:150)
at com.atlassian.confluence.pages.persistence.dao.GeneralAttachmentMigrator.migrate(GeneralAttachmentMigrator.java:25)
at com.atlassian.confluence.util.longrunning.AttachmentMigrationLongRunningTask$1.doInTransactionWithoutResult(AttachmentMigrationLongRunningTask.java:71)
at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:33)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:127)
at com.atlassian.confluence.util.longrunning.AttachmentMigrationLongRunningTask.runInternal(AttachmentMigrationLongRunningTask.java:66)
at com.atlassian.confluence.util.longrunning.ConfluenceAbstractLongRunningTask.run(ConfluenceAbstractLongRunningTask.java:21)
at java.lang.Thread.run(Thread.java:595)