G'day thesaintrugby
What you have to realise is that your question gets asked about every 10 new threads on this forum....
There is a little button up the top called "Search" but Ive made it easy for you
If You Click Here & you can see that these are all the questions asked about BF1942.
I'm certain that if you take the time to read these your answer will be found.... If not then post back here....
However, It sounds like you installed that game & then downloaded & installed Version 1.2 crack. Well that wont work because installing of the original disc only takes BF1942 to Version 1.
You have to
Download the Version 1.2 Patch install it & then Install the version 1.2 crack.. Take care how you install the Crack... heaps of threads... that your now reading of course cover this.......
Goodluck.............
Make sure you start again.....uninstall & delete the Program Files>EA Games>BF1942 folder after youve uninstalled then reboot.... do a search on your computer for bf1942.exe as you may have placed the crack in the wrong spot & delete it if it finds one.... Then do a fresh install > update with the 1.2 Patch > install the 1.2 Crack....