U.S. Robotics ControlCenter hangs on exit

[imported_N]

Hi,
USR ControlCenter software hangs on exit if any functions are executed; dialog (message) box persists.
Have to Restart to remove warning dialog box.
:?: Does anyone else have this problem, or a solution?

I'm using a USR 3CP5610A, upgraded to V.92, on Win98SE.
The problem existed before as well as after upgrading firmware.
The modem otherwise works okay.

TIA
-M
_____ detail _____
Downloaded latest files from USR, CC twice, by different downloaders.
On select file ControlCenterUsa.exe for install,

Invalid size or check sum of file or unsupported compression format - Native error 00008. File processing error, possibly disk is full.

Executed install okay (though it blithely skipped past option to locate). Fault likely "Invalid size or check sum of file" since installed okay, temp disk had 5.89GB free, 59% free, and destination had 2.38GB free, 30% free.

Install modem, connect, and later upgrade firmware were fairly smooth 8 ) , following USR and forum instructions exactly.
AFAIK, the 5610A with firmware upgraded to V.92 is functionally (and physically) equivalent to the 5610B.
The modem otherwise works okay (usually connected at 52000 bps, 20% higher rate than the HCF (Winmodem) it replaced, with connected speeds seemingly the same before and after firmware update. Disconnects are infrequent, but the HCF modem had rarely disconnected).

On exit ControlCenter,

CTRLCNTR caused an invalid page fault in
module KERNEL32.DLL at 017f:bff9db61.
Registers:
EAX=c00309c4 CS=017f EIP=bff9db61 EFLGS=00010202
EBX=0231fe28 SS=0187 ESP=0218fe80 EBP=0219011c
ECX=00000000 DS=0187 ESI=00000000 FS=7097
EDX=bff76855 ES=0187 EDI=bff79198 GS=0000
Bytes at CS:EIP:
53 8b 15 e4 9c fc bf 56 89 4d e4 57 89 4d dc 89
Stack dump:
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