Userform Called In Other Workbook Interrupts Procedure

I have a procedure that opens workbooks from a list and then searchs for a phrase given by user. If nothing is found it closes workbook and opens next one. If phrase is found it highlights it on workbook. I wanted to give user some options when phrase is found: to search further in next workbook and to search further, but leaving current workbook open. Here my misery starts.

The only way i made up to perform it was to use Userform and code: userform.ActiveControl.Name. But it seems that Userform called in other workbook than one where the module is, interrupts somehow the procedure. When workbook, where the userform was used, closes the procedure doesn't go on. Evidently Userform is the issue here as without it, macro works.

See my code below :

[Code] .........