salesforce for outlook plugin missing from toolbar

Resolution: The install has not registered a vital component ' adxloader.dll' for some reason.There are couple of reasons for this miss try below, If i miss anything or need some configuration or any access issue. Now i am really frustrated to this as we have tested in sandbox with similar configuration we are getting everything and now in prduction we are not getting the 'Salesforce Side Panel' option in outlook to our User. Only found the 'Salesforce Toolbar Option is available in that Add-Ins option list.

One more thing when i look the Outlook Add-Ins i diden't get 'Salesforce Side Panel' option nither in Enable nor in Disable option list. When we have configure first the same configuration in sandbox and i have tested in my machine with simmilar configuration i am able to get the 'Salesforce Side Panel' When that user open his outllook he dident able to see the 'Salesforce Side Panel' control. And Install the 'Salesforce for Outlook' Version 2.2.3 in his machine he is using Outlook Vesion 2010.

I have configure 'Salesforce for Outllook' for one User in Production.

Salesforce for outlook plugin missing from toolbar