Same Blocks - Different Redstone Signals

From the WirelessControllerGuiContainer, I send a packet to the Server with the Redstone-signal and the frequency. In the onMessage()-method, I iterate through the loadedEntityList, check for the frequency and if everything's correct, i change the redstonesignal in the TileEntity. That's all working for now.

In the WirelessReceiverTileEntity the setRedstoneSignal(bool) looks as follow:

public void setRedstonesignal(boolean redstonesignal)
    {
        this.redstonesignal = redstonesignal;
        this.markForUpdate();
        this.worldObj.markBlockForUpdate(xCoord,yCoord,zCoord);
    }

In the WirelessReceiver-Block-class, I implemented these two methods which get the Redstonesignal from the TileEntity and set it:

@Override
    public boolean canProvidePower()
    {
        return true;
    }

    @Override
    public int isProvidingWeakPower(IBlockAccess iba, int x, int y, int z, int p_149709_5_)
    {
        if(iba.getTileEntity(x,y,z) instanceof WirelessReceiverTileEntity)
        {
            WirelessReceiverTileEntity wrte = (WirelessReceiverTileEntity) iba.getTileEntity(x,y,z);
            return wrte.isRedstonesignal() ? 20:0;
        }

        return 0;
    }

I hope that i set up these methods correctly, otherwise it's going to be embarrassing

EDIT:

IT'S WORKING!!!!!

I had to call the method "notifyBlocksOfNeighborChange" in the TileEntity and call a few times the updateTick()-method.

Thanks for your help coolAlias,

you helped a lot.

Julian