NetScaler to F5 problems with cookies

Final workaround:

when HTTP_REQUEST {

switch -glob [string tolower [HTTP::path]] {
    */301* { pool pool_301_8080
      persist cookie insert NSC_bgn301 "1d 00:00:00" }
    */302* { pool pool_302_8080
      persist cookie insert NSC_bgn302 "1d 00:00:00" }
    */303* { pool pool_301_8080
      persist cookie insert NSC_bgn303 "1d 00:00:00" }
    */304* { pool pool_305_8080
      persist cookie insert NSC_bgn304 "1d 00:00:00" }
  default { pool pool_whatever_80 }
  }
}

when HTTP_RESPONSE {
  set myValues [HTTP::cookie names]
    foreach mycookies $myValues {
      HTTP::cookie secure $mycookies enable
    }
} 

Since I was unable to set the persistence timeout to 0(session), I had to set it to 1 Day (1d 00:00:00). Securing cookies now works as I had passed the wrong argument in the original post.