GUI on on conference bridge cards locks up

[exmcier]

It used to happen infrequently, now it is happening every other day os so. The Web GUI on the conf bridge appears to lock up on any/all of our Nortel ICBs. Whn I lock up occurs we stat the card (see below), disable it, reseat it, then re-enable it. Then we are back in business until the next lockup.
We run IE in compatibility mode because I think the Nortel ICB boards are spec'd to support onl IE 6(?). It appears to just be a GUI lock up because the audio path still works. The vast majority of these lockups occur sometime between 1am & 7 am. Onlything running during that time is the midnight routine with no errors found. Does anyon have any ideas?

REQ: stat 4 1 14
00 = UNIT 00 = IDLE (2616 LOG IN )
01 = UNIT 01 = IDLE (2616 LOG IN )
02 = UNIT 02 = IDLE (2616 LOG IN )
03 = UNIT 03 = IDLE (2616 LOG IN )
04 = UNIT 04 = IDLE (2616 LOG IN )
05 = UNIT 05 = IDLE (2616 LOG IN )
06 = UNIT 06 = IDLE (2616 LOG IN )
07 = UNIT 07 = IDLE (2616 LOG IN )
08 = UNIT 08 = IDLE (2616 LOG IN )
09 = UNIT 09 = IDLE (2616 LOG IN )
10 = UNIT 10 = IDLE (2616 LOG IN )
11 = UNIT 11 = IDLE (2616 LOG IN )
12 = UNIT 12 = IDLE (2616 LOG IN )
13 = UNIT 13 = IDLE (2616 LOG IN )
14 = UNIT 14 = IDLE (2616 LOG IN )
15 = UNIT 15 = IDLE (2616 LOG IN )
16 = UNIT 16 = IDLE (2616 LOG IN )
17 = UNIT 17 = IDLE (2616 LOG IN )
18 = UNIT 18 = IDLE (2616 LOG IN )
19 = UNIT 19 = IDLE (2616 LOG IN )
20 = UNIT 20 = IDLE (2616 LOG IN )
21 = UNIT 21 = IDLE (2616 LOG IN )
22 = UNIT 22 = IDLE (2616 LOG IN )
23 = UNIT 23 = IDLE (2616 LOG IN )
24 = UNIT 24 = IDLE (2616 LOG IN )
25 = UNIT 25 = IDLE (2616 LOG IN )
26 = UNIT 26 = IDLE (2616 LOG IN )
27 = UNIT 27 = IDLE (2616 LOG IN )
28 = UNIT 28 = IDLE (2616 LOG IN )
29 = UNIT 29 = IDLE (2616 LOG IN )
30 = UNIT 30 = IDLE (2616 LOG IN )
31 = UNIT 31 = IDLE (2616 LOG IN )
REQ: idc 4 1 14
=> NT5D51BC01NNTML2NNTML218V4WQ2104