Upgrade from 1.9.2.1 not possible via Magento Connect

[shiftmint]

Dear Community

I installed today Magento 1.9.2.1 together with a Theme I bought. They offering a Quick-Installation where you copy the complete Magento Directory including the first Theme configuration (I was never sure that's a good Idea, but for Configuration it's much easier).

The Installation then comes in Magento 1.9.2.1 and I tried to upgrade via Magento Connect.

But if I click "Check on Upgrades" nothing happens, except, that "Check for Upgrades" disappears.

What do I have to do?

Many thanks,
Stefan

[Magician_Dhara]

I will recommend you to check console for real error. And also check in system.log or exception.log file for error and try to solve it.