Solve this sub-menus overlap problem?

Hi all,
AnandSoft.com website design, Software development, and Certification practice tests.

See this page in Google Chrome browser… and observe the menu and mouseover the menu, it will show up the first level sub-menus nicely…
When you mouse-over on the first-level menu, the second level sub-menu items are overlapping with the first level menu items…

I think this is of css problem with Chrome browser, because in IE and Mozilla it is showing nice…

How to solve this problem…

Thanking you…

Any one can solve this problem.

Thanking you.