Upgrading Drupal

I just updated my site to run 5.16 and in the process upgrade my Calendar and Date modules to their most recent stable builds. (v2.5 for both I believe). However, now I'm getting a error message:

Fatal error: Call to undefined function: date_time() in /hsphere/local/home/mhtchurc/mhtcoc.org/church/sites/all/modules/calendar/calendar_api.inc on line 344

I'm running on the latest build of PHP4 (on a hosting company) and have Date PHP4 active. Has anyone else experience a similar issue?

... and other corresponding tables.......

What I have is drupal 5.1 which is becoming slow and cumbersome. Over 130 MB for the database. The php timeouts are not occurring at reasonable durations presumably because there are some invalid entries somewhere in the database causing *something* to loop. It consumes more than 200 percent of my allotted conqueries and 150 percent of my CPU minutes.

I am on shared with no access to any logs whatsoever to determine what is consuming so much. I can provide versions of software if requested.

What I would like to do is take all necessary tables and convert them for use in 6.x. I am thinking this may take care of the problems that I'm having. Perhaps something in one of the core files has been corrupted or that one of the modules that I had installed in the past has left some weird untraceable entry in one of the core tables. I don't see any errors in my drupal logs except the occasional "duplicate entry" to the DB.

Hi,
I'm using custom template to display special content type. I'm using such code to display CCK fields :
<?php print $node->field_genre[0]['view'];?>

Working fine since couple of days.

Hello,

I've just upgraded my Drupal site: Apache 1.3 to 2.2, PHP4 to PHP 5, MySQL 4.0 to 5.x, Drupal 5.11 to 5.16

Everything seemed to be ok until now: when I try to add more than one attachment to a node, I get some strange behaviour:

- list of attached files disappears: I have to click preview to get it back (each time a put an attachment to the node)
- when I get it back, list is not selected anymore

Settings seems OK (have not been changed since the update), PHP max ulpoad is OK (there is no problem of file size or users' quota)

I want to use a template that is version 6.3
I use Drupal version 6.6
Are these compatable with each other?
is there anything i need to do different?

I downloaded the new CCk update, uploaded it to the modules folder, and extracted it, now the Admin menu is missing a lot of things:
http://jacktm.net/images/missing.png
http://jacktm.net/images/missing2.png

Then a notification took me to the Drupal Database Update, where I saw how I should have done it... I clicked the link to the Site Maintenance, but it's not there... Neither is Site info, Performance, and a bunch of other stuff...