Openoffice doesn't show open window

I use Open Calc to open some CSV files directly from Windows Explorer but the open window doesn't show up over all the rest of opened windows and I must to minimize all the other windows one by one to find it, so I decide to open Calc before and click over open button most of times works but after a wake up from suspend mode the window just doesn't show up and Calc is unresponsive; doesn't appear to be hang up in Windows Task Manager but the UI is really stuck.

I'm using W7 x64 8GB of RAM and OpenOffice 4.

There's a configuration issue or just a bug? If is a bug, There's a way around this?

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