[ccp4bb] Newbie Installation Question

[Yuri]

Dear all,
I have just downloaded and installed the ccp4-6.2.0. 
It says all I should do next is source the /setup-scripts/csh/ccp4.setup 
file... I have done that, but I cannot launch the program...
Any help is welcome...(it is probably something really stupid on my part...)
Best,