WP Atahualpa and other themes not working properly on new host

Hi,

My original site is here http://bachutha.drpetersnews.com/. I am transferring everything to a new host. It it has been one long nightmare. The new site is here http://bachutha.com

The first time I transferred the site about 6 days ago, I imported the db -sql import, the WP (Tools Import) and and copied the Athualpa subdirectory. I ran into unbelievable amount of

"Error establishing a database connection".

My original site (and other website http://www.drpetersnews.com - multi-domain site) went off line with

"Sorry for the inconvenience!
The filesystem mounted at / on this server is running out of disk space. cPanel operations have been temporarily suspended to prevent something bad from happening. Please ask your system admin to remove any files not in use on that partition."

I was stuck because I couldn't go back to my old server and down load the files again. After many tries of installing fresh Atahualpa (download from WP)..., deleting & creating a new db (empty) file... and importing into WP the XML files.... It started to work.

The next day the site went blank. I could log into WP as administrator but could not view the site as a visitor - blank screen.

Switched to Twenty ten and twenty eleven theme the screens came back ... the website was visible. Everything looks ok in 2010 and 2011 themes. In Atahualpa the thumbnails in the excerpts did not show. Then tried changing settings, tried changing to full post (WP Settings / Reading), imported Atahualpa settings,.... didn't work. Deleted whole site and reinstalled WP, Installed fresh Atahualpa and imported data (WP tools / import) with new empty db. It looked like it was working - except thumbnails in excerpts missing.

Next day, thumbnails missing in excerpts. Then read me links in excerpts didn't work. Now I really do not know what to do.

I began searching for alternative theme. Tried a few looked okay by not happy with theme design. Spent almost 6 hours searching for more themes. Tried out many themes. ... Then I noticed all those tested alternative themes began to give similar problems as with Atahualpa - thumbnails missing and read me links on excerpts not working.

I have removed & installed all plugins but no difference with or without plugin.

Now I am very stuck and the old host is closing shop in about 30 days.

What should I do to get it working correctly like my old site?

- Peter