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 '.'