Problem Posting a Service Order

We are having problems posting a single service order. The order has 21 lines, and the initial error we received was:

“Every Service Line must have Tax Calculation Type = VAT if any Service Line has Tax Calculation Type = VAT”.

We looked in the Service Line table and all of the records were on Normal VAT except one, which had a value of Sales Tax. We changed the value to Normal VAT and tried to post again, receiving the following error:

“Tax Calculation Type must be Normal VAT in Gen. Journal Line Journal Template Name=’’, Journal Batch Name =’’, Line No. = 0”

We looked in the Gen. Journal Line table and found a blank record with Line 0 but it had Normal VAT in the Tax Calculation Type. We deleted it but that didn’t seem to help.

Any ideas?