Fatal Error LNK 2001

[Taco Sniper]

Hey there,
I recently moved from SFML-1.6 to SFML-2.1, and have encountered error 2001. The full error is:
1>VisibleGameObject.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall VisibleGameObject::Draw(class sf::RenderWindow &)" (?Draw@VisibleGameObject@@UAEXAAVRenderWindow@sf@@@Z)
1>VisibleGameObject.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall VisibleGameObject::SetPosition(float,float)" (?SetPosition@VisibleGameObject@@UAEXMM@Z)
I have never encountered this error before, and after much Google-ing, I have found nothing to resolve it. Thus I came here to see if the SFML community is able to help.
Thanks in advance,
-TacoSniper-

[eXpl0it3r]

It simply means that the linker couldn't find the implementation of these two functions. Did you change the naming convention to camleCase as well (i.e. draw() and setPosition())?

Also the class keyword should not be needed.

[Taco Sniper]

Hi,
Thanks man, but what solved that problem was removing virtual from in front of both functions, but now it says that:
"The program can't start because sfml-system-d-2.dll is missing from your computer. Try reinstalling the program to fix this problem."
I have searched the SFML-2.1 file and have found it in the bin file, but how to I get the IDE to find/include it when compiling??
Thanks,
-TacoSniper-

[eXpl0it3r]

The DLLs are needed at runtime not compile time. Reading the tutorial might help:

Now compile the project, and if you linked to the dynamic version of SFML, don't forget to copy the SFML DLLs (they are in <sfml-install-path/bin>) to the directory where your compiled executable is.

[Taco Sniper]

To you sir, I tip my hat,
Thanks man that fixed it and it runs perfectly now,
A very grateful,
-TacoSniper-