Convert string to datetime produces error

Hi All,
I am trying to convert a string to a datetime. When I use the formula below with an alias table, it gives me an error "Invalid Column Name c1.Date"
SELECT CONVERT(datetime,left([c1.Date],2)'/'substring([c1.Date],3,2)'/'right([c1.Date],4),101) AS Date
FROM callrecords c1
Is there another way to convert the string to a datetime?
I am using CR 2008 SP1.
Thank you in advance.

What happen if you run the sql without the conversion,
SELECT c1.Date FROM callrecords c1
do you still get the same error message?
if you don't get the error message you can let crystal do the conversion for you by using the following function in a formula
CDate ({c1.Date})

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