I guess you are getting this type of error.
[user@user myprojectdir]# svn up
Skipped '.'
do svn st from your project dir
[user@user myprojectdir]# svn st
svn: warning: '.' is not a working copy
it means you are not in your working dir.
You might have done a wrong checkout.
Correct way is this.
[user@user ~]# svn co http://xxx.xxx.x.xxx/projectPRJ/trunk/ myprojectdir
[user@user ~]# cd myprojectdir
[user@user ~]# svn up
Note: But if you messup with above order, svn up will not work for example.
[user@user ~]# cd myprojectdir
[user@user myprojectdir]# svn co http://xxx.xxx.x.xxx/projectPRJ/trunk/
[user@user myprojectdir]# svn up
you will get Skipped '.'