Can't figure out how to reset Digi Transport WR21


I recently purchased a WR21 on ebay. There seems to be a slight problem though, this particular unit doesn’t want to let me access it via serial, only responds to AT commands, and the HTTP login page will not accept the default username and password. I’ve tried the reset button several times, but it seems to be stuck in its configuration from the previous user no matter what I try. I am going to attempt to gain access myself before filing a dispute, so any advice is much appreciated. I can’t get flashwriter or the USB method to work, I’m stuck with a paperweight unless you can help me. Thank you very much for any info.

Use Digi Flashwriter to load image to flash