Error calling external object function intialize

Hi all,

In our application we are using CaseDocs.DocCasesCtl control.

We are recieving "Error calling external object function intialize" when the below line of code is being executed.

ole_1.object.Initialize(is_case , gl_obsessionhandle)

FYI. The same code is working in XP machine but not in Windows 7.

We tried re-registering CaseDocs.ocx but had no luck.

Please advice on this.

Thanks in advance,

Lavanya.