500 internal Server error

When i am going to start the WEBrick server i got the following
error....

C:\mystic_0.1.4>ruby script/server./script/../config/boot.rb:
26:Warning: Gem::SourceIndex#search support for Strin
g patterns is deprecated
=> Booting WEBrick...

What should i do for correcting for this error.

Thank You

Soutom