Is the RPT file marked as Read-Only?

>Dear All,
>When i modify a report in Crystal Report and then try to save it. A error box is poped.
>The error message is
>File Saved Failure.
>This Document cannot be saved in purchase.rpt. Saved in a~033am79.tmp.
>
>then i have to save this file as a purchase.rpt.
>
>it occurs wheneve i try to change the text property or add some database field.
>Or insert Line or box.
>
>Please Help me. I have got fed up of this. I have switched to seagate crystal last month.
>
>ThankU in Advance.