SQL Format or Literal errors on Date value trying to query new requirements after a specific date.

Running this SQL works ok 

SELECT REQ.RQ_REQ_ID /*Requirement.Req ID*/ , REQ.RQ_USER_06 /*Requirement.Reference Id*/ , REQ.RQ_TARGET_REL /*Requirement.Target Release*/ , REQ.RQ_USER_01 /*Requirement.Requirement Status*/ , REQ.RQ_USER_11 /*Requirement.Work Status*/ , REQ.RQ_REQ_STATUS /*Requirement.Direct Cover Status*/ , REQ.RQ_REQ_DATE /*Requirement.Creation Date*/

FROM REQ /*Requirement*/

But when I want to select only new requirements created after a specific date, I get different format or literal errors.

WHERE  REQ.RQ_REQ_DATE /*Requirement.Creation Date*/ > '2013-07-24 00:00:00' 

But those are the values produced when i don't specify the date.

Any help would be appreciated.