Classic ASP Cookie Error

At least some of my website visitors (possibly all) are getting the following error when my script is setting the expiry date of a cookie.

It happens the first time a user calls the page, but if they refresh it works fine.

Microsoft VBScript runtime
Type mismatch: 'Response.Cookies'
/locale.asp, line 24

23: Response.Cookies("locale") = Session("locale")
24: Response.Cookies("locale").Expires = DateAdd("m", 6, Now())

I can reproduce the problem and if I view the cookie information in IE developer tools immediately after the error, that cookie exists and the expiry date is correct, ie. 6 months from today.
knobbylowboyAsked:
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Rajesh DalmiaConnect With a Mentor Commented:
you are assigning Session("locale") into Response.Cookies("locale")...
seems like for the 1st time Session("locale") does not exist....
during refresh that session gets created and thus does not give any error
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knobbylowboyAuthor Commented:
I thought that the error was due to the expiry line but I see that under some circumstances I was passing a null value from a database into the session variable and then passing that value to the cookie so I guess the cookie didn't exist when I tried to set the expiry date.
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