There seems to be some sort of longpoll (or other connection) issue between GPUMAX and the ZTEX mining software. I get lots of rejects and overflows. BitMinter and EMC work without problem. I have no idea what the problem is. The poll loop time jumps up and also getwork and submit time. If i ping the pool the timing is about 200ms. That's not brilliant but should work ? No problems with cgminer and my 3 GPUs.
Here is what i get with BitMinter and EMC.
bus-0-0: ztex_ufm1_15d3-0001-02-05: f=208.00MHz, errorRate=0.02%, maxErrorRate
=0.74%, hashRate=208.0MH/s, submitted 18 new nonces, luckFactor=1.03
bus-0-0: ztex_ufm1_15d3-0001-02-06: f=212.00MHz, errorRate=0.99%, maxErrorRate
=1.86%, hashRate=209.9MH/s, submitted 16 new nonces, luckFactor=0.94
bus-0-0: poll loop time: 15ms (USB: 0ms network: 15ms) getwork time: 144ms su
bmit time: 293ms
Total hash rate: 417.9 MH/s
Total submitted hash rate: 409.5 MH/s
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bus-0-0: ztex_ufm1_15d3-0001-02-05: f=208.00MHz, errorRate=0.12%, maxErrorRate
=0.74%, hashRate=207.8MH/s, submitted 15 new nonces, luckFactor=1.03
bus-0-0: ztex_ufm1_15d3-0001-02-06: f=212.00MHz, errorRate=0.46%, maxErrorRate
=1.86%, hashRate=211.0MH/s, submitted 9 new nonces, luckFactor=0.91
bus-0-0: poll loop time: 15ms (USB: 0ms network: 15ms) getwork time: 179ms su
bmit time: 280ms
Total hash rate: 418.8 MH/s
Total submitted hash rate: 404.5 MH/s
--------
New block detected by long polling
bus-0-0: ztex_ufm1_15d3-0001-02-05: f=208.00MHz, errorRate=0.26%, maxErrorRate
=0.74%, hashRate=207.5MH/s, submitted 11 new nonces, luckFactor=1.01
bus-0-0: ztex_ufm1_15d3-0001-02-06: f=212.00MHz, errorRate=0.96%, maxErrorRate
=1.86%, hashRate=210.0MH/s, submitted 11 new nonces, luckFactor=0.91
bus-0-0: poll loop time: 16ms (USB: 0ms network: 16ms) getwork time: 187ms su
bmit time: 287ms
And now GPUMAX

bus-0-0: ztex_ufm1_15d3-0001-02-05: Using LongPolling URL http://gpumax.com:8332
/listenChannel
bus-0-0: ztex_ufm1_15d3-0001-02-05: f=200.00MHz, errorRate=0.00%, maxErrorRate
=0.00%, hashRate=200.0MH/s, submitted 1 new nonces, luckFactor=0.36
bus-0-0: ztex_ufm1_15d3-0001-02-06: f=200.00MHz, errorRate=0.00%, maxErrorRate
=0.00%, hashRate=200.0MH/s, submitted 0 new nonces, luckFactor=0.00
bus-0-0: poll loop time: 145ms (USB: 0ms network: 145ms) getwork time: 1416ms
submit time: 1078ms
Total hash rate: 400.0 MH/s
Total submitted hash rate: 71.6 MH/s
--------
Warning: jsonParse: Parameter `data' not found
bus-0-0: ztex_ufm1_15d3-0001-02-05: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15d3-0001-02-06: Set frequency to 204.00MHz
bus-0-0: ztex_ufm1_15d3-0001-02-05: f=204.00MHz, errorRate=0.00%, maxErrorRate
=0.00%, hashRate=204.0MH/s, submitted 16 new nonces, luckFactor=1.00
bus-0-0: ztex_ufm1_15d3-0001-02-06: f=204.00MHz, errorRate=0.00%, maxErrorRate
=0.00%, hashRate=204.0MH/s, submitted 13 new nonces, luckFactor=0.77
bus-0-0: poll loop time: 475ms (USB: 0ms network: 475ms) getwork time: 1730ms
submit time: 2104ms
bus-0-0: Warning: 10 overflows occured. This is usually caused by a slow network
connection.
Total hash rate: 408.0 MH/s
Total submitted hash rate: 357.9 MH/s
--------
bus-0-0: ztex_ufm1_15d3-0001-02-05: Set frequency to 208.00MHz
bus-0-0: ztex_ufm1_15d3-0001-02-06: Set frequency to 208.00MHz
New block detected by block monitor
New block detected by long polling
bus-0-0: ztex_ufm1_15d3-0001-02-05: Set frequency to 212.00MHz
bus-0-0: ztex_ufm1_15d3-0001-02-06: Set frequency to 212.00MHz
New block detected by long polling
bus-0-0: ztex_ufm1_15d3-0001-02-05: Set frequency to 208.00MHz