When "Save" i got "Error Writing ..." the "Save as" Works fine

Hello sirs

I have Ver. 12.0.0.536 with SP1 installed running on Dual Xeon with  2Gb ram & XP SP3

When i try to save any file ..opened from anywhere (i mean local or from network ..i am also administrator to local machine!)i got the message "Error Writing to  h:\....\....\....\test.cdr

When i try to use the "Save as" it works Fine! ...& then i also can use the "Save".

Any ideas?

Thanks

Thomas - SV2CLJ