Well, it could be the size of the .jpg if the image is larger than the recommended sizes for roPosterScreen which you can find here:
http://sdkdocs.roku.com/display/sdkdoc/ ... ringasVoidAnother possibility is that your image has an SSL URL which would require you to call setCertificatesFile & InitClientCertificates for your poster screen component. Also possible is that the image is corrupt in some way that our library can't decode it. Or its a .jpg in name only, for example, you can save a file as a .png but rename it to .jpg and some software will still decode it, but not all.
- Joel