Microsoft JScript runtime error: 'Sys.Extended.UI' is null or not an object

hi dear forums.asp.net members. i am using urlrewritingnet for url rewriting. at one of my page i am using auto complete extender . it works fine for first page weirdly because also that page is getting url rewriting.

now let me explain you

my normal page is

domain/Pokedex.aspx

here what i do for url rewriting

<add name="PokedexPageWrite"  virtualUrl="^~/Pokedex-(.*)"
              rewriteUrlParameter="ExcludeFromClientQueryString"
              destinationUrl="~/Pokedex.aspx?Page=$1"
              rebaseClientPath="false"
              ignoreCase="true"  /><add name="PokedexTurkceRewrite"  virtualUrl="^~/Turkce-(.*)"
            rewriteUrlParameter="ExcludeFromClientQueryString"
            destinationUrl="~/Pokedex.aspx?Language=$1"
            rebaseClientPath="false"
            ignoreCase="true"  /><add name="PokedexTurkceRewritePages"  virtualUrl="^~/Turkce-Pokedex-(.*)"
        rewriteUrlParameter="ExcludeFromClientQueryString"
        destinationUrl="~/Pokedex.aspx?Page=$1"
        rebaseClientPath="false"
        ignoreCase="true"  />

ok now problem does not happen when i type this : domain/Pokedex.aspx

but i when i type this problem occurs : domain/Pokedex-2 which is equal to domain/Pokedex.aspx?page=2

here is the problem screen shot

but when i type this problem does not happen : domain/Pokedex.aspx?page=2

so it is about url rewriting i guess

i really need to solve this problem ty very much