Strange problem to tackle

Hi all,I have a problem with few applications which are not working after upgrading from R5 to R6.5.3 client on client machine.

There is a VB application whoch sends a attachment to some predefined users. It was working fine till we have upgraded to Lotus Notes 6.5.3. Now it stoped working fine throwing a error message as below.

Run-Time eror ‘7368’

Rich text Item Already exists

Did anyone encountered this problem. It supposed to open Lotus Notes client and attach a file.

all other functionality respect to mailing ids working fine.

Thanks in advance.

Cheers

Sri.