if I download a midp file to a Nokia QD over a open internet account, then everthing works. If I use the WAP Proxy settings (APN, Proxy IP) of my operator so it only downloads the jad. The device tries then to download the jar directly from the internet (tries to bypass the proxy IP) which does not works with certain operator settings (if WAP APN isn't equal Internet APN).
Is this problem specific to Noka N-Gage QD? It works with e.g. Nokia 6680.