changed CAS now no spark

ok heres my problem maybee someone can help

I have a 97 blazer, and it was running rough. Then It sat for a couple weeks and when I went out to drive it it was real rough cranking and eventually broke the half moon part of the starter case off. so I did some research and concluded that it needed a new crank angle sensor, along with the new starter. So I replaced both and now the motor just cranks with no spark. Fuel is there but when I try to connect my scanner it says that it can not connect to the computer.

Anyone have any thoughts? I looked at all the fuses by the drivers door and they all look intact, is there anywhere else I can look for fuses?

I also tried putting my old CAS in and with no result so the new one went back in.

Thanks
Kenny

What is the battery at as far as volts?? I have had happen where a dead cell battery will give you the same output! Just want to rule that out!!