Help creating applescript to select email data and insert in existing Excel workbook

Question

Hi there
I'd really appreciate some help.
I want to select three types of data, specifically Name, Email address, and a Date, from the body text of emails in Mac Mail, and export them into columns in an existing Excel workbook.
I've set up a rule in Mail based on the sender, and specified an Applescript action based on the script below. I've sent test emails to meet the rule conditions, and included in the body of these emails the text items below to trigger the script rules, but the Applescript doesn't do anything.
Where I am going wrong?
using terms from application "Mail"
  on perform mail action with messages theMessages for rule TravelRule
  tell application "Mail"
  repeat with each_message in theIncomingMessages
  -- reset the variables
  set thetext to content of each_message
  display dialog thetext
                                        set {thename, theemail, thedates} to {"", "", "", ""}
  -- get the message text
  set message_text to content of each_message
  -- setup text item delimiters
  set {old_delims, my text item delimiters} to {my text item delimiters, ": "}
  -- iterate through the lines of the message looking for the keywords
  repeat with each_para in (paragraphs of message_text)
                                                  if text item 1 of each_para = "Name" then
  set thename to text item 2 of each_para
                                                  else if text item 1 of each_para = "Email" then
  set theemail to text item 2 of each_para
                                                  else if text item 1 of each_para = "Dates" then
  set thedates to text item 2 of each_para
                                                  end if
  end repeat -- each para
  set my text item delimiters to old_delims
  end repeat -- each_message
                              tell application "Microsoft Excel"
  activate
                                        open workbook "/PathDetailsHere/Workbook1.xls"
                                        set formula of range "G6" of worksheet "sheet1" to thename
                                        set formula of range "G9" of worksheet "sheet1" to theemail
                                        set formula of range "G12" of worksheet "sheet1" to thedates
  end tell
  end tell -- application "Mail"
  end perform mail action with messages
end using terms from
I'm a complete Applescript newbie, so any help would be really appreciated! Thank you.

Answer 1

my variables are global for all data providers since I use the same query for my data providers.
It's just the values (some of them : ex: conso version) that differ from one data provider to another.
ex : here for 2 diff Data providers based on the same query i need to enter the following values for mandatory variables
Different versions / different years but same conso group / data entry year/ posting period.
i would like to have the possibility to enter these values out of the "select values for variable" window (not convenient when we have 7 or 8 DP...), but directly in the workbook.
But maybe this is not possible...
In DP1                 
conso version = A_PL                         
conso group = FR01
data entry year = 9999
fiscal year = 2010
Posting period = 12
In DP2
Conso version = P4_MAG
Conso group = FR01
Data entry year = 9999
fiscal year =2011
Posting period = 12