My seam is thick

I’ve tried to sew my knit project many times…but i don’t know…it’s like thick…so the sewed-part is seen…

any suggestion in doing this?..i’ve seen my book, and i think i did it right…there must be some trick in doing this…

thanks

Have a look at Amy’s seaming techniques show half way down this page. There are matching videos:

http://www.knittinghelp.com/knitting/basic_techniques/misc.php