After upgrading to Lion my white MacBook I can't launch Adobe CS4 Applications. Please help!

Everytime I try launching an Adobe CS4 application (Photoshop, Illustrator, watever...) I keep getting this kind of message, more or less:
"To open [Photoshop] CS4 you should install a Java executed environment, but you are not connected to the internet"
And I am! Why can't I run any of those applications? Can anyone please help me?
Thanks in advance.

Hello Carolyn, thank you for your help.
I tried what they recommend on the Adobe pages, but the problem seems to be that the internet connection is not being detected.
I tried opening Java Preferences and a similar window appeared saying a Java environment is needed but I am not connected to the internet - but obviously I am.
As soon as I can solve this problem I will try what you recommend.
Can you please help me with the connection issue? As you may see, the window suggests to open the Network Diagnostics preferences panel. When I do, I get a good diagnosis but when I ask to verify the connection and enter the WEP password it fails to connect. I close the Prefs panel and connect again using the signal icon above, and I am back online!
Thank you again, Carolyn.

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After upgrading to Lion my white MacBook I can't launch Adobe CS4 Applications. Please help!

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