ahh well if searching doesn't help,try looking from the last page (did work for most of my server probs)cause they have been posted many times earlier....if u have re-check all ur ODBC entries n re-tried the guide again but still got the prob try this soltuon(if it doesn't work try the alternative[the 2nd one worked for me in the first shot]) :
1)Go to Start > Programs > Microsoft SQL server > Enterprise manager > then enter ur SQLserver groups n into local > Security > logins > now check if u have the login user "a3serial" with password "dkdlxpawprhdnpc" with db owner as A3ItemEvent,if it does not exist create one n set the db owner as "A3ItemEvent",if ne part of the user is wrong delete it n create a new "a3serial" with all required stuff (i.e. correct password n db owner of A3ItemEvent).
Still got the prob try this....
1)Go to enterprise manager >> A3ItemEvent Database >> Users >> now u'll see two user names out here namely,dbo and a3serial key >> deleted a3serial key >> now go back into Security file n into Logins,the "a3serial" user will be there >> delete the login n create a new "a3serial" with password "dkdlxpawprhdnpc" but DON'T set it as the owner of "A3ItemEvent" >> go back into database files >> into A3ItemEvent >> Users >> right click here n select New Database user option from the drop down menu >> type "a3serial" in "Login name" (or select it from the options already in drop box) >> once "a3serial" is selected check the "db_owner" check box.....click OK n ur done....hope this helps