No 90min w/ 124TSi?

I bought some 90min cdrs. The brand is SKC Media, Korea.
But everytime i try to burn about 88mins onto it Nero tells me:
Error, No Seek Complete - Burn not succesfull although i set the overburn-capacity to 89:59:00 in Nero’s expert settings.

I tried all speeds from 12 to 2 (10,8,4) but still no go. I have firmware 1.07.