Q: I see the program running in the Taskbar, but it doesn't appear or come to the foreground when I click on it.

This can occur if you reconnect to your VM from PC's with different size desktops. It can sometimes cause an application window to resize beyond the reach of your screen.  The problem is usually only see in 2003 OS's.
 
Here is the fix for it:

Right-click on the application button in the Taskbar and select Size. Better yet, press the S key. This way, you'll be using the keyboard immediately.
Look for a four-way arrow cursor somewhere on the screen. It might be along one of the edges of the screen, or tucked up in a corner.
Use the arrow keys on the keyboard to try and expand the window size. If you don’t see anything, you might be expanding an extent of the window that's not visible yet (i.e., it might be offscreen). Press Enter to end the sizing operation.

Immediately after you select Size, the arrow key you strike will determine which edge of the window you’re resizing. For instance, if you hit Size and then press the right arrow key, the right edge of the window will be the one sized. You might need to size each window edge separately by selecting an edge, sizing it, pressing Enter and then repeating the process for another edge. This is a simple two-step process.

Right-click on the application button in the Taskbar and select Move. This will again cause a four-way cursor to appear somewhere.
Use the arrow keys to move the window into view now that it's been sized properly.