Shell Programming and Scripting

Hello everyone I am a newcomer to UNIX and I have hit a snag in something that would probably take experienced people about 30 seconds. Long story short I am trying to add a directory to my PATH and it is getting added but not working. I mean, the object of adding it to the path is so I can access it anywhere in my terminal right?

I am also confused about delimiters needed in tschrc. Do I need colons or not?

I used the command:

Code:

echo ' set PATH = ($PATH /usr/local/bin:/c4251/bin:)' >> ~/.cshrc

this added the directory permanently to the end of my path but i cannot access it from my home directory so what good is it?

I echoed my path and this is what I saw:

Code:

/usr/class/sce/bin:/usr/local/bin:/usr/local/matlab/bin:/usr/local/maple/bin:/usr/bin:/bin:.:/usr/lib64/qt-3.3/bin:/usr/NX/bin:/usr/class/sce/bin:/usr/local/bin:/usr/local/matlab/bin:/usr/local/maple/bin:/usr/bin:/bin:.:/usr/local/bin:/bin:/usr/bin:/opt/dell/srvadmin/bin :/usr/local/bin:/c4251/bin

I added in colons because it appeared the other entries had them. Does this not work because there is a space in between the last entries? If this is the problem how to I correct this? Any help would be greatly appreciated. I am a beginner in UNIX!