Freezing after escaping chemical lab.

[zookeeper156]

Amd Atlon 64 X2 Dual Core Processor 3800+ 2.00 ghz
2 GB
Windows 7 Ultimate
Nvidia GeForce 6150 SE nForce 430

Really enjoy the game and was excited to start next one but it decided it should freeze. I even tried starting from a different save point. Can anyone tell me the issue?

EDIT:

Problem fixed with patch.