Designer loses connection

Hi:

I got this error continuously from designer. When I want to see the scripting, or when I save my project, the designer loses connection with gateway but the clients works well.

[attachment=2]time_out_3.png[/attachment]

Also I got this:
[attachment=1]listing_tables.png[/attachment]

And this:
[attachment=0]saving_project_gateway.png[/attachment]

Do you think that I need do an upgrade?!

There is another thread on here about same thing also. I am on 7.7.4 and I see it on occasion here also.

Ok, thank you.