start by installing the clock and tabs for all pages file found here:
http://forum.ppcgeeks.com/showthread.php?t=44689
**they are manilla files just unzip and copy and paste into windows folder.
Then install the cab found here:
Calenadar, Comm Manger, Cals Additional Tabs.CAB
this should fix your problems, it worked great for me.
FYI- the manilla files will make you have the stock sprint slider/curtains, so if you don't want them just reinstall your other cabs/manilla files to change back to your custom setting if your so inclined.
hope this helps it is exactly what I did, no problems with the clock at all. If this doesn't work you may have to hard reset then do as I said above.