Can my employer refuse to pay me prevailing wage after H1B approval.

Hi,

My H1B got approved earlier this month. Now my employer is refusing to increase my salary as per the latest prevailing wage. They are saying that my wage is already high.

I refrred to the Foreign Labor site http://www.flcdatacenter.com/ and as per this my salary is 10K less than the suggested wage for my area.

Can I send the screenshot of the site to them and pressurize them to increase my wage. What can I do about it ?

Please guide me.

Thanks

Divs