Not working if runned from windows share

Windows 8 pro 64bit connected to enterprise domain.
mRemote Portable installed on mapped home drive.
Mremote runs, shows the connections.
Clicking on VNC or RDP, an error appears:

VNC :
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ErrorMsg
29/11/2013 10:39:08
Opening connection failed!
Unable to connect to the server. Error was: An invalid argument was supplied
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RDP:
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WarningMsg
29/11/2013 10:39:34
RDP disconnected!

This computer can't connect to the remote computer.

The two computers couldn't connect in the amount of time allotted. Try connecting again. If the problem continues, contact your network administrator or technical support.
Error code 264.
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If installed locally or on usb drive, everything works fine