Gets error for server changing

I posted this project two days ago and hired someone couldn't get done. I already did matching code too. If anyone can fix within 24 hours, please bit. It could be MySql version bag problem. I have wordpress and oscommerce site to move hosting. I did it myself and get error. I can't fix it. (I could install to different server and only oscommerce doesn't appear on the site.) The error: 1267 - Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '=' select value from sessions where sesskey = '1b924eae0e77ac69b224fca638541f77' and expiry > '1219025780'