Sometimes if u install the full version over the shareware it wont work (even if u uninstall the shareware first), only way to fix this is to reformat windows, dont install the shareware and just install the full version. Not sure if this is whats going on with urs? but this happened to me, maybe someone has released a fix for it, but its stupid!!
Intel C2D E6750 (1333fsb) 2.66 @3.5ghz |EVGA 680i SLI Mobo | 2GB Twin XMS ddr800 @ 875 | Leadtek 7950 GX2 Core@601 Mem@1600
500GB IBM/HITACHI Sata2 7200/16MB | 160GB 7200rpm 8mb UDMA133 Maxtor | XION 600w dual 12v 44A total SLI PSU | X-fi Xtreme Music | 22" Widescreen Acer LCD