737 600 & 700

Ok I unisntall all addon liveries, I unistall the 737ngx.I reinstall the 737ngx and loaded the sp1. no problem, I made a quick flight and have no problems.I pay for the extension pack down loded and it shows in the livery in fsx. but wend I tried to loaded in fsx all I get is a black screen.so how can I get it to show in fsx. thanks.