MacBook Pro can't connect to Time Capsule or network drives

I have a MacBook Pro (2.2 GHz, Intel i7, 4 GB RAM) and for some reason it can not connect to either the Time Capsule or any network drives.  We were recently out of town on vacation and before the vacation, everything worked fine.  Now, that we are back, the MacBook will connect to the wireless network and can access the internet, etc but it can not access either the Time Capsule or any drives I have setup as shared that's connected to the iMac.  I go to the Network and it doesn't show anything as available to connect to.
I have restarted both the MacBook and the iMac and even turned off and back on file sharing on the iMac.  I have even restarted the Time Capsule but nothing is working.  Both the MacBook Pro and iMac are running Lion (10.7.2).  All have the latest updates, etc.  Also the Time Capsule has all of the latest firmware updates.  Again, this was working fine last week.  Now this week, nothing.
Can someone please help?  I use the Time Capsule for backups and the network drive for iTunes.  Without those, the MacBook Pro is missing a lot of functionality.
Bronson

It might help to reset the connection settings on your Mac using these steps one at a time until the problem is resolved, recognizing that, depending on your problem, not all of these steps will make sense:
1) Use the AirPort menu bar item to turn AirPort off, then on again.
2) Try to select your Wi-Fi network from the AirPort menu.
3) In the Network panel of System Preferences delete the AirPort item from the left column, then add it back.
4) In the same panel as (3), define a new location and see if you can make that work.
5) In the same panel, select the AirPort connection item, click the "Advanced" button, select the "TCP/IP" tab, then click "Renew DHCP Lease".
6) In the folder /Library/Preferences ( _not_ <yourhomefolder>/Library/Preferences), move the folder SystemConfiguration onto the Desktop, then restart your computer. See if you can now make your AirPort connection work.
These steps may not help, but they'll only take a couple of minutes to try.  Before you try these, if you have any special network settings on your Mac for things like DSL credentials, note all your network settings, because the latter steps will destroy them.  If you got all the way to the last step, if things don't work any worse than before, you can trash the saved SystemConfiguration folder.

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