Try DateValue > '20080110' (assuming 01 is the month and 10 the day). That's the ISO representation, which works irrespective of user locale in TSQL generally. If not, then you'll have to hope someone with better SSIS experience answers.
When I ever need to do date expressions I always create a variable to hold the value, cause working with dates in SSIS expressions can be a major pain. Create a package scope variable called dateCompare with dataType Date and set the date you need, then in the expression type the expression below. date_change is from the data source date_change > @[User::dateCompare] Creating a variable is easier, cause you can then easily change the value, or you can change the variable value at runtime. If you want to put the value in the expression use it like this, you have to cast the string to a date format date_change > (DT_DATE)"2010-05-30"