Compiling Some errors by compiling TFS >_<"

[lordazzi]

Hey bodies, I was in a happy afternoon when the clouds covered the sky,
so, when I was compiling the Forgotten Server 0.2.12 (compatible with Tibia 9.46) using DevCpp from Forgotten (The one that they give for download in the forum), after some minutes from rebuilding (the ctrl+f11 thing) when DevCpp use 'ERRORS' and was super effetive, I could ajust some simple errors (with the help of some friends using they super powers) with exception of something, and this I have no idea what it is:

  [Linker error] undefined reference to `DatabaseManager::tableExists(std::string)' 
  [Linker error] undefined reference to `DatabaseManager::isDatabaseSetup()' 
  [Linker error] undefined reference to `DatabaseManager::updateDatabase()' 
  [Linker error] undefined reference to `DatabaseManager::updateDatabase()' 
  [Linker error] undefined reference to `DatabaseManager::checkTriggers()' 
  [Linker error] undefined reference to `DatabaseManager::checkEncryption()' 
  [Linker error] undefined reference to `DatabaseManager::optimizeTables()' 
  *** [TheForgottenServer.exe] Error 1

Somebody can help me speaking to me how can I fix this unhappy error and make the sun shines in this sad morning of April? D: