Sql - CommandTimeout Seems To Have No Effect Queries Still Timing Out After 30 Seconds?

Our production database as grown to a size where several of our longer running stored procedures are taking more than the default 30 seconds to complete. I've programatically set some of the CommandTimeouts on the command objects but the calls to the store procedures still appear to be timing out after 30 seconds.

Here's what I did:

In web.config set this property

add key="CommandTimeOut" value="180"

Added this to the top of my class that needs the timeout set:

Dim COMMAND_TIMEOUT As Integer = ConfigurationManager.AppSettings("CommandTimeOut")

After creating the command object set the timeout property on the object.

cmd.CommandTimeout = COMMAND_TIMEOUT

Unfortunately my stored procedures still seem to be timing out when they take longer than 30 seconds to execute.