Customer Self Service and kit problem

 Hello all,             We have problems with Customer Self-Service functionality in P4210 and Kit Items. We use it from Product Catalog in Portal. The user select a kit and click "Save & Next" in P4210 application to continue adding items. When he tries to add another item he receives and error about F40UI74 file and all kit component appears in the grid. Can anyone help us?

Thanks in advance...

 

Arturo.