Use Multiple MembershipProviders At One Time?

I've got multiple membership providers in my web.config and in my login control,

I am going to use the provider based on a drop down list with the name of the provider.

Web.config:

<system.web>
<membership>
<providers>
<remove clear />
<add name="MyOwnProvider1" .... />
<add name="MyOwnProvider2" .... />
</providers>
</membership>
</system.web>

In Login.ascx.cs:

I am selecting the provider based on a drop down list like so:

MembershipProvider provider = Membership.Providers[dropDownList.SelectedItem.Text];

Problem is whenever I hit this line, it always tries to connect to MyOwnProvider1 when in fact MyOwnProvider2 was selected!