Solidworks can't save the Parts form toolbox.

I get always a error message. "Failed to save part to filename

'C:\SWX_Vorlagen\Normteile\Circlip DIN 471 - 35 x 1.5.sldprt' (the last is the partname)

I must copy the toolboxpart from a othere PC and paste it into my "Normteile" folder, then I can use it.