Why did I first get error 0x8004119 In Outlook and now a few weeks later have Unknown error - 0x80040119?

Good Morning Everyone,

I have a strange Outlook issue that is causing me a lot of grief.  About a month or two ago, I had the first problem with this particular Outlook file (it's a client's file).  It began giving me error message "Unknown error - 0x8004119" whenever you try to send/recieve and it would not send or recieve anything.  I spent hours trying to fix it and made a post here on EE and several experts tried to help.  We ran the Microsoft ScanPST tool, tried a free third party app, and all the other things referenced in the EE post that can be viewed here: http://www.experts-exchange.com/Software/Office_Productivity/Groupware/Outlook/Q_24093037.html and in the end, I had to revert to a backup copy of the PST file that was about a month old and I had to export the sentbox, contactsc, etc into a .CSV file because Outlook woudl crash and say "out of memory" when you tried to export to a .PST file and take everything.  I ended up copying and pasting the Inbox manually only because the .CSV option woudl not have preserved attachements.  For no rhyme or reason, I found I could copy messages back about 3 weeks, any further than that and Outlook would start giving the "Unknown error - 0x8004119" again in the new PST file.  We finally gave up and called it good enough.

Now fast forward about a month or so, give or take, and now I have a new error message in the new .PST file that is only different by one digit.  The new message is "Unknown error - 0x80040119" and we can't send or recieve.  The original message was ox8004119 and now a few weeks later it's 0x80040119.  These are only different by one digit and when I look them up with Microsoft, I see a very similiar symptoms and resolution page.  First of all, does anyone know if they are different at all and if so how???

Anyway, the real problem is what is causing this and how to fix it.  I'm starting to look bad in front of the client because we keep having Outlook issues, however it really is kind of a mystery to me here.  Now, they do have a Blackberry for what it's worthy, and they do have a two way sync setup between Outlook and the Blackberry.  

Also, when we first got the new error message on Friday (0x80040119) I went ahead and reverted to a backup file from 3-4-09 and manually copied the Inbox messages out of Outlook to a folder and then copied and pasted them back into the new .PST file because Outlook was so messed up that it would not let me open two .PST files at the same time as I had done to remedy this similiar problem in the past.  I kept getting the same "Out of memory" message.  Now, on Friday I tested it by sending messages, downloading messages, syncing their blackberry, etc.  Everything was fine . . . it worked all day Friday and all weekend until yesterday when the client called me and said they were getting the same "0x80040119" error message again.  They said all they were doing was going back through the Inbox and deleting old messages they didn't need.  This led me to wonder, could the issue be a problematic e-maili in the Inbox that Outlook does not know what to do with but does not cause the problem for the first time until you attempt to open it in that .PST file?  Otherwise, I'm completely out of guesses.  I've tried everything here!  

Sorry for the long post, I wanted to try and explain it all though.  If anyone needs any points clarified just let me know and I'd be glad to post it up!

If anyone has any useful input, I would be very thankful!!!