php5 gd imagerotate() function

[Joey L <mjh2000@gmail.com>]

To All:

I am getting this error on my site:
Fatal error:  Call to undefined function imagerotate() in /var/www/html/websites


I was told that i need the imagerotate() function to be enabled in the pre-packaged gd package that i installed.

I found this link in google :
http://digitalconsumption.com/forum/622-PHP-imagerotate-on-Debian

With these steps on how to do it :

apt-get source libapache2-mod-php5
apt-get build-dep libapache2-mod-php5
cd php5-5.2.0/
sed -i 's/-with-gd=share,\/usr/-with-gd/' debian/rules
debian/rules binary
dpkg -i libapache2-mod-php5_5.2.0-7_amd64.deb



But when i get to this step :

 apt-get build-dep libapache2-mod-php5 

I get the following error:

Failed to fetch cdrom:[Debian GNU/Linux 4.0 r0 _Etch_ - Official amd64 DVD Binary-1 20070407-12:15]/pool/main/libm/libmcrypt/libmcrypt4_2.5.7-5_amd64.deb  MD5Sum mismatch


So my question to you..is How do i get to enable this function ??? How do i get around the MD5Sum error ???? I have found some code to use instead - but i am not much of a php coder....so i was looking for easy solution to my issue.

thanks much.
mjh