Language detection not working in Typo3 6.2.12 - typo3

Question

I've a website which has 2 languages: German (de) as default and English (en) as translated. I am trying to implement language detection functionality in the website using the extension "rlmp_language_detection" version 7.0.0.
What I want to achieve is, for the countries Austria (at), Switzerland (ch) and Germany (de), the website should be stay in default language German and for all others, the users in other countries should see the website in English.
I've added the below typoscript to implement this. But not working anymore;
plugin.tx_rlmplanguagedetection_pi1 {
defaultLang = de
languageAliases >
languageAliases {
de = de
at = de
ch = de
}
countryCodeToLanguageCode >
countryCodeToLanguageCode {
de = de
at = de
ch = de
}
}
page.987 =< plugin.tx_rlmplanguagedetection_pi1
Can you please help me to solve the problem? Thanks in advance.

Answer 1

I've added the following configuration;
plugin.tx_rlmplanguagedetection_pi1 {
useOneTreeMethod = 1
defaultLang = de
limitToLanguages = de,en
}
page.987 =< plugin.tx_rlmplanguagedetection_pi1
I understood that the functionality is not working only with this configuration. We need to "Select Official Language (ISO code):" in the website langauge ( alternate language we added in the root ).
Now its works as intended..:)