it does sound like your chain is too tight, if you don't feel confident adjusting it yourself, then evans should be willing to fix it for free.
if you want to do it yourself, these should help.
http://www.rodcycle.com/articles/eccinstructions.pdf http://www.tandem-club.org.uk/cgi-bin/db_config.pl?noframes;read=5473 http://www.cannondale.com/asset/iu_files/techcenter/2003_eccentric_bb_chain_adjustment_owners_manual_supplement_en.pdf
@deleted started
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it does sound like your chain is too tight, if you don't feel confident adjusting it yourself, then evans should be willing to fix it for free.
if you want to do it yourself, these should help.
http://www.rodcycle.com/articles/eccinstructions.pdf
http://www.tandem-club.org.uk/cgi-bin/db_config.pl?noframes;read=5473
http://www.cannondale.com/asset/iu_files/techcenter/2003_eccentric_bb_chain_adjustment_owners_manual_supplement_en.pdf