Hi,
Thanks for responding. Yes i researched and found that i had to use a PNG8 format. So i've actually gone ahead and done that and it worked great. i created one map service that has my cached PNG8 ortho photos and then i have a shape layer underneath. when i added these 2 map services to one web application it worked great and the ortho images which were on top show my layers underneath. so now i actually want to put some layers on top and below these cached ortho images. however once i've done this i found that my layers on top seem to completely obscure my orthoimages and other layers below. this map service on top is not cached. so now i'm not sure what to do. why are these layers masking out my cached ortho image. when i turn off the layers on top i can see my ortho image just fine.
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