I'm getting this error when I try to run Synaptic

E: Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 20000000. (man 5 apt.conf)
E: Error occurred while processing xorg (NewVersion1)
E: Problem with MergeList /var/lib/apt/lists/ftp.us.debian.org_debian_dists_testing_main_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.
E: _cache->open() failed, please report.

Plus this error when I try apt-get update:
E: Could not get lock /var/lib/dpkg/lock - open (11 Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 20000000

Start>Gexec

Type in check the box to run as root.

edit in/etc/apt/apt.conf
from

APT::Cache-Limit 20000000

to

APT::Cache-Limit 60000000 (at least that is what I did). Close and save document.

For everything else. Open terminal enter password Hit enter. When done. Close terminal. Then you can go and start installing stuff in synaptic or terminal. Whichever you prefer. Hopefully you won't get any errors.

Post back on any errors if you do get any after this. A readout from terminal would be nice in next post also.

Thanks, setting to 60000000 worked.