Buttons do not work Create, Write, and Close, Cancel, Exit

[richper]

I'm sory if I did something wrong. I do translation with Google.
I do not understand English, but in the Russian forum could not help me and advised me to go to the forum of the developer.
The situation is as follows.
I installed Joomla 2.5.4 and 2.0.6 VirtueMsart on the local host. And I do not work click Create, Create and Close, Cancel, Exit.
In Joomla work. But in Virtuemart does not work.
In Joomla found only an extension of VirtueMart.
Please help me in solving my problem.