Parsing URI to Make Pool Selection

I could not get the nested if statements to work. However, by creating two separate iRules, and applying each to the VS, I was able to get the logic to work.

Virtual Server xyz.com iRules

First: iRule_poolA

Second: iRule_poolB

iRule_poolA

when HTTP_REQUEST { 
   if { [string tolower [HTTP::path]] contains "/ws/test.aspx" } { 
      if { ([matchclass [IP::client_addr] equals poolA.AllowList])} {
          use pool poolA
          log local0. "Permitted (poolA): [IP::client_addr][IP::client_addr] --> [HTTP::header host][HTTP::uri]"    } 
   }
}  

iRule_poolB

 when HTTP_REQUEST { 
   if { 
   [string tolower [HTTP::path]] contains "/ws/test.asmx" 
   } { if { ([matchclass [IP::client_addr] equals poolB.AllowList])} {
          use pool poolB
          log local0. "Permitted (poolB): [IP::client_addr][IP::client_addr] --> [HTTP::header host][HTTP::uri]"
}  else {
discard  
log local0. "Denied (poolA and poolB): [IP::client_addr] --> [HTTP::header host][HTTP::uri]"      }  
   }
}

Any ideas why this doesn't seem to work by combining both iRules into a single iRule?