FDISR OS empty snap drive letter change

Very peculiar...I installed a stripped down version of winXPpro 3 on an empty snapshot. All usual snapshots resides on K: system drive and in addition I have a C:data drive.After a successful install in empty snapshot I turned up with drive letters changed to C: system and D:data....Reinstalled FDISR and all is normal except that I can´t copy/update from the new C:---! Even if I change the archives to new D:data drive and change from vss to rss. But if I go into my previous snapshots I can copy/update the new OS to the usual archive normally. So, I have a new OS installed with new drive letters and can´t copy/update from that snapshot, if I make changes and want to update I have to go back to old OS snapshot and in there no problems, updating and restore included...All works but with a twist in it...