asunited

I have just downloaded TOH from justflight.com. It has a download manager program. I have downloaded all files (12). It says they have all downloaded correctly. I have installed them but when i run the TOH there are 10 boxes but ticks in only 8 of them. All i then get is a mouse pointer and music but nothing else. I have a pentium 4 3.60ghz cpu,4 gb ram, 2 geforce 7800gtx cards sli linked with the latest nvidia drivers.