I having a BIG problem in my web site. Today i am starting update it but cannot add new level. I thinking the problem in my project and start to do new. And then i will surprised when i try to add a new page (not new level in this case) and have the same error. Program is corrupt with any error number. As i understand this program having limitation in the page and/or level numbers. I need quick support. 

P.S. I think it was happen after one of program update in this year.