Problems with New Installation - Video files require K-lite Codex

[Glenn Hada]

I recently changed to a new Laptop . I previously had Windows Vista on my other computer and Hoster worked like a charm. Here is the specifics on my new computer:
Windows 7 (64 Bit)
Celeron Processor 2.2 GHZ
2GBG Ram
250 Hard Drive
Using 1TB External Ram for my songs
Went throught he check list and did the changes required for Windows 7 and also downloaded the latest version 5.02.

I went into tools and imported my existing kma files and rebuilt the data base and the cdg files work perfect. The problem is with the video files MP4. I have imported the files and when I look at the playtime of the video it says e.g. 3:30 minutes long but when I play it , first of all I press Play then the duration changes to like 80:00 minutes and although the duration clock runs down, nothing plays. It says that the video is like 80.00 . Also everythime I press a button " The nonresponsive windows button appears then it takes long to get stable. I am going to install total of 4gb Ram today because of the requirements of Windows 7, but the video problem is driving me bananas. Help!!!