Version 1.1.7 database error reported

[gopher_moi]

HI.  I'm running v1.1.7, and last night our web hosters upgraded their servers and are now running PHP V5.  Since that took effect, whenever someone with Admin rights posts the following message comes up: 
Can't create/write to file '/var/lib/mysql/#sql_5b40_0.MYI' (Errcode: 13)
File: /var/www/html/smf_forum/Sources/Subs-Post.php
Line: 1413

Note: It appears that your database may require an upgrade. Your forum's files are currently at version SMF 1.1.7, while your database is at version 1.1.4. The above error might possibly go away if you execute the latest version of upgrade.php.

Normal users get this message
Please try again. If you come back to this error screen, report the error to an administrator.

However, if they then click on 'Home' the posting they were trying to make is there.

I have tried uninstalling back to version 1.1.4 and then re-installing  to 1.1.7 to no avail.  Things remain the same. 

Any suggestions how to stop the error messages?

[gopher_moi]

Our web hosters appear to have fixed this problem after one of my fellow administrators put in a support ticket.  I'll leave the topic up in case someone else gets affected similarly. 

[N3RVE]

Marked as Solved.

-[n3rve]