Convert date string to datetime

I have a date and time field I need to convert to true date time field.

This works but is not recognized at a datetime field with I apply other formulas to it for filtering, such as previous month data, etc...

atsdate + ' ' + atstime AS AtScene

returns this value:

2009-10-30 21:15:00

Still a string, not datetime

I am using SQL 2005 and SSRS 2008r2

Thanks in advance
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dsackerContract ERP Admin/ConsultantCommented:
Try this:
CONVERT(datetime, atsdate + ' ' + atstime) AS AtScene

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dsackerContract ERP Admin/ConsultantCommented:
Please keep in mind that if either the atsdate or atstime do not combine into a valid datetime, SQL Server will let you know about it with an error message that it could not convert an invalid date/time string.
srodgers45Author Commented:
Thank you for the assistance
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Microsoft SQL Server 2005

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