Help with APE/SIO2PC!

[AtariDisk]

Hello I'm rather new to this, and I was wanting a little help. I recently bought an Atari 800xl and 1050 because they were going cheap and I loved it and the software packaged. However, I soon bought a SIO2PC thinking I could get ATR images off internet and run them on atari. I bought the serial cable model, and a serial adapter (I thought my pc had a serial port, alas, only usb) but when running the APE it throws up the error "[device manager] rs232 driver failed to initialize (usb only mode enabled)". The drivers are correctly installed as far as I'm aware, it says the serial adapter is in COM port 4, I don't know if this makes a difference. Thanks for your time

[+Stephen]

I think there is a command line switch for APE which forces it into USB mode. Make sure the shortcut to it is not passing this in. If that's not the issue, I am not sure.