For my 'lastmodify' datatype is TIMESTAMP(14)

In my search result screen i tried to put the <dtml-var> attribute like this:-

<dtml-var lastmodify fmt="%d-%m-%y %H:%M">

but it return this result:-

Zope Error

Zope has encountered an error while publishing this resource.

Error Type: TypeError
Error Value: illegal argument type for built-in operation

Troubleshooting Suggestions

The URL may be incorrect.
The parameters passed to this resource may be incorrect.
A resource that this resource relies on may be encountering an error.

For more detailed information about the error, please refer to the HTML source for this page.

If the error persists please contact the site maintainer. Thank you for your patience.

And i tried to use the namespace like this

<dtml-call REQUEST.set('_.['lastmodify']','b')>

<dtml-var b fmt="%d-%m-%y %H:%M">

it return the attribute error:

Zope Error

Zope has encountered an error while publishing this resource.

Error Type: TypeError
Error Value: illegal argument type for built-in operation

Troubleshooting Suggestions

The URL may be incorrect.
The parameters passed to this resource may be incorrect.
A resource that this resource relies on may be encountering an error.

For more detailed information about the error, please refer to the HTML source for this page.

If the error persists please contact the site maintainer. Thank you for your patience.

Can u tell me how to display my date as :

2001-02-08 04:41 PM