install "Linux DC++"...gtk+ >= 2.6 not found
 

Hi all,
I'm trying to install "Linux DC++" and this are the results:
#scons
scons: Reading SConscript files ...
Checking for g++ >= 3.4...ok
Checking for pkg-config... ok
Checking for gtk+-2.0 >= 2.6... failed
gtk+ >= 2.6 not found.

I have "gtk2 version 2.6.7" installed..isn't this the same thing?
If yes ... how shoul I tell scons there to find it?
I also have the "gtk+ version 1.2.10" installed..

thanks

install gtk2-devel