"Too Many Client Tasks" Error

i have a website hosted with crystaltech which needs to send out reminder emails to customers on a day and time of their choosing. to do this i used the server sheduled tasks to call a page every hour which does a search checking for time and day that match and then loop thru the recordset sending out a CDONTS email to those records.

this would run fine for 12 - 15 hours and then the IIS would crash with the "Too many client tasks" error. this seemed strange as at most it would find one or 2 records matching the time. i presumed some error must be occuring (even though it was sending out emails correctly) and thus the recordset wasn't being closed correctly. Code: