hmm... in your block class, this might work:
public boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
{
if (par1World.isRemote)
{
return true;
}
else
{
TileEntityYourFurnace tileentityfurnace = (TileEntityYourFurnace)par1World.getBlockTileEntity(par2, par3, par4);
if (tileentityfurnace != null)
{
par5EntityPlayer.openGui(YourMod.instance, 0, par1World, par2, par3, par4);
}
return true;
}
}
-sorash67 || Skorpio