Runtime Error occurred when starting skype

Hi Whiz,
I am freelance using skype to some extent to keep in contact with client. For past two days I am in trouble. Whenever I open the skype, runtime error is occurring and it instructs me click either yes or no. But not able to do anything, even I am not able to close the program. System task manager helps me to close the program. Whizzes why I am getting this error? How to solve this? Help please.

A Runtime Error has occurred. Do you wish to Debug?
Line: 52
Error: Object required
