We recommend you to reset the Slingbox Classic and run the whole configuration one more time. This link will help you with the instructions.
Make sure to follow this recommendation and let us know how it works.
I am having the same problem. I have reset my slingbox solo several times and have unplugged and plugged in each component of my network several times. I am even hardwired to my network from my computer as well as the slingbox.
Is there anything else I can do? I am unable to connect to the device on the desktop software and the web configuration says the connection is failing due to a poor connection.
My PC is a MAC (10.6.6)
Browser is Firefox (3.6.16)
Router is Corega