Node.js no such file or directory

I'm trying to install node/npm on a shared server for some testing. As its shared, I'm trying to install it in my own folder, ~/usr/bin

I've extracted the tar, and can see node/npm...

ls /kunden/homepages/myId/htdocs/usr/bin/nodejs/bin
node npm

If I echo $PATH (as I have modified .bashrc) I see the folder...

/usr/local/bin:/usr/bin:/usr/X11R6/bin:/bin:/usr/local/msql/bin:/usr/games:.:/kunden/homepages/myId/htdocs/usr/bin/nodejs/bin

Now if I call npm or node, it 'finds' the node file, but then says

line 2: /kunden/homepages/myId/htdocs/usr/bin/nodejs/bin/node: No such file or directory

even if I put in the full path it says this, so it appears npm/node is looking for another file it can't find ?

I can see the file it says...

file /kunden/homepages/myId/htdocs/usr/bin/nodejs/bin/node 
/kunden/homepages/myId/htdocs/usr/bin/nodejs/bin/node: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped

So I know in my path it can see node/npm fine. Is there some other file its looking for that I've missed ?