Required DLLs aren't uploaded on Bitbucket Repository

Hello,

Thanks in advance for the solution...

We are using bitbucket from last 6 months and haven't faced problem like below:

We created a C# project using MVC 4 which creates some packages itself to use with the projects. When we uploaded the code to repo through SourceTree the DLLs contained in package folder didn't uploaded and our developer on the other side faced so many issue while running that code.

Is there something like restriction or something in the sourcetree of bitbucket that doesn't allow auto-generated DLLs to upload?

Please give your answers asap as we're not able to carry on with the project.

Thank you.