Cannot access OPDS with iPad

I only started using Calibre (with Marvin) a few (~6) months ago. Originally I was able to access OPDS. I am now getting errors that Marvin or a browser cannot connect.

On the PC (win7-64) the test server works fine. The server log shows the following:
192.168.0.109 - - [11/Dec/2014:01:40:00] "GET /opds+ HTTP/1.1" 404 719 "" "Marvin%20for%20iOS/2.8.1 CFNetwork/711.1.16 Darwin/14.0.0"
192.168.0.109 - - [11/Dec/2014:01:40:12] "GET /opds+ HTTP/1.1" 404 719 "" "Marvin%20for%20iOS/2.8.1 CFNetwork/711.1.16 Darwin/14.0.0"
192.168.0.141 - - [11/Dec/2014:01:46:41] "GET /opds+ HTTP/1.1" 404 719 "" "Marvin%20for%20iOS/2.8.1 CFNetwork/711.1.16 Darwin/14.0.0"
192.168.0.141 - - [11/Dec/2014:01:47:04] "GET /opds HTTP/1.1" 401 739 "" "Mozilla/5.0 (iPad; CPU OS 8_1_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12B435"

Any ideas on the problem?

Thanks, John

PS....change from 109 to 141 was changing access points to see if it made any difference