I have made a Coded UI Test with VS2015 and created an environment on a virtual machine.
Then on my local machine i connected to the teamproject in VS2013 and started the test build.
Unfortunately i receive an error "\SomeServer\drops".
When i run the tests on the VM by command line, it's all okay.
Can anybody help?

Here the error protocol:

04:41
Overall Build Process

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Application Deployment Workflow

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Update Build Number

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Get Build Details

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If Build is needed

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Get Build Location And Build Number

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Compute build location needed

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Compute build path

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If user selected stored environment

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Get Lab Environment Uri

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Get Lab Environment

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 If Restore Snapshot

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No Clean Snapshot

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If Virtual Environment

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If deployment or test needed

00:00
Wait For Environment To Be Ready

04:40
If deployment needed

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Do deployment

00:00
Reserve Environment For Deployment

04:40
Deploy Build on Environment

04:40
Deploying Build

04:40
Run Deployment scripts

04:40
Run Deployment Task
Deployment Task Logs for Machine: PC-GUI-Test.prosoft.net
 Folgender Pfad konnte nicht für den Zugriff mithilfe des Lab-Dienstkontos hinzugefügt werden: prosoft\devadmin, \SomeServer\drops. Ursache: Der Netzwerkpfad wurde nicht gefunden.
 Das System kann die angegebene Datei nicht finden
 Exception Message: Team Foundation Server could not complete the deployment task for machine 'pc-gui-test.prosoft.net', script 'C:\deployment.exe' and arguments ''. (type LabDeploymentProcessException)
Exception Stack Trace: 
Server stack trace: 
 bei Microsoft.TeamFoundation.Lab.Workflow.Activities.RunDeploymentTask.ExecuteDeploymentTask.RunCommand(AsyncState state)
 bei System.Runtime.Remoting.Messaging.StackBuilderSink.\_PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
 bei System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink)

Exception rethrown at [0]: 
 bei System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase)
 bei System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData)
 bei System.Action`1.EndInvoke(IAsyncResult result)
 bei Microsoft.TeamFoundation.Lab.Workflow.Activities.RunDeploymentTask.ExecuteDeploymentTask.EndExecute(AsyncCodeActivityContext context, IAsyncResult result)
 bei System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)

00:00
Release Environment From Deployment