permissions on checkout error

Getting an error on checkout due to permissions. checkout folder doesn't exist beforehand (brand new build added to project), wondered if you might be able to shed some light on it if you've had any experience. Checks out find on beetlejuice elsewhere without problems:

2006-11-21 15:06:20,107 ERROR [BAM::BuildChangeDetector] [DefaultBuildChangeDetector] Failed to get the build source code
com.atlassian.bamboo.repository.RepositoryException: Failed to get source code
at com.atlassian.bamboo.repository.svn.SvnRepository.getAllSourceCode(SvnRepository.java:365)
at com.atlassian.bamboo.build.DefaultBuildChangeDetector.getCleanBuild(DefaultBuildChangeDetector.java:237)
at com.atlassian.bamboo.build.DefaultBuildChangeDetector.checkIfBuildNeedsBuilding(DefaultBuildChangeDetector.java:155)
at com.atlassian.bamboo.build.DefaultBuildChangeDetector.doTask(DefaultBuildChangeDetector.java:100)
at com.atlassian.bamboo.build.DefaultBuildChangeDetector.run(DefaultBuildChangeDetector.java:68)
at java.lang.Thread.run(Unknown Source)
Caused by: com.atlassian.bamboo.repository.RepositoryException: Failed to get source code
at com.atlassian.bamboo.repository.svn.SvnRepository.checkout(SvnRepository.java:511)
at com.atlassian.bamboo.repository.svn.SvnRepository.getAllSourceCode(SvnRepository.java:360)
... 5 more
Caused by: org.tmatesoft.svn.core.SVNException: svn: Cannot read from 'C:\Developments\build\work-directory\build-dir\SHAREDLIBRARIES\jruby\jruby-0.9.1\lib\ruby\gems\1.8\doc\activesupport-1.3.1\ri\ActiveSupport\CoreExtensions\LoadErrorExtensions\LoadErrorClassMethods\.svn\tmp\text-base\cdesc-LoadErrorClassMethods.yaml.txtdelta.svn-base': path refers to directory or read access denied
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:29)
at org.tmatesoft.svn.core.internal.wc.SVNFileUtil.openFileForReading(SVNFileUtil.java:692)
at org.tmatesoft.svn.core.internal.wc.SVNDeltaProcessor.textDeltaEnd(SVNDeltaProcessor.java:74)
at org.tmatesoft.svn.core.internal.wc.SVNUpdateEditor.textDeltaEnd(SVNUpdateEditor.java:329)
at org.tmatesoft.svn.core.internal.wc.SVNCancellableEditor.textDeltaEnd(SVNCancellableEditor.java:109)
at org.tmatesoft.svn.core.internal.io.svn.SVNEditModeReader.processCommand(SVNEditModeReader.java:153)
at org.tmatesoft.svn.core.internal.io.svn.SVNReader.parse(SVNReader.java:311)
at org.tmatesoft.svn.core.internal.io.svn.SVNConnection.read(SVNConnection.java:195)
at org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.read(SVNRepositoryImpl.java:795)
at org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryImpl.update(SVNRepositoryImpl.java:509)
at org.tmatesoft.svn.core.wc.SVNUpdateClient.doUpdate(SVNUpdateClient.java:145)
at org.tmatesoft.svn.core.wc.SVNUpdateClient.doCheckout(SVNUpdateClient.java:263)
at com.atlassian.bamboo.repository.svn.SvnRepository.checkout(SvnRepository.java:506)
... 6 more