SMS Doesn't work right any more

We have been using the old version of SMS for quite some time now and all the sudden we can no longer do pretty much anything associated with SMS (Remote assistance, query's, etc).  Though we can type in "C:\smsadmin\bin\i386\remote 2 xxx.xxx.xxx.xxx" and most of the time it will work.  I am able to open the WWA SMS site from the SMSMASTER (our sms server) console when logged on as to our domain as an old user. The only thing that I can assocaiate it to is a possible rights issue.  A while back we went from a single domain admin user to individual ones for all domain admins, could this have caused issues.  What are some places I can check to verify rights and roles on the server.  Any other suggestions?
WipfliAsked:
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WipfliAuthor Commented:
_com_error exception in MMC Admin UI!

Description:       Factory Enumeration Failure
HRESULT :       0xEEEE0001
File :             E:\OPALSP5\mmcadminui\Support\sms_nmgr\NMGR_NodeData.cpp
Line:             221
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Description:       CWbemAsyncNodeFactory::Enumerate Failed

Query :select distinct coll.* from SMS_Collection as coll join SMS_CollectToSubCollect as assoc on coll.CollectionID=assoc.subCollectionID where assoc.parentCollectionID="COLLROOT"


HRESULT :       0x800706BA-The RPC server is unavailable.

File :             E:\OPALSP5\mmcadminui\Support\SMS_NWBM\NWBM_CWbemAsyncNodeFactory.cpp
Line:             107
Entry Point :       Chlid node factory error Collections
Operation :       
Command Line:       "C:\WINDOWS\system32\mmc.exe" "C:\SMSADMIN\bin\i386\sms.msc"
Trace :            
0
ee_ai_constructCommented:
0

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