I see the problems.
Again, in the Settings your Default Model Path should be just to the modelsrc folder... so in your screen it should say:
C:\Program Files (x86)Steam\steamapps\mad21sun\sourcesdk_content\cstrike\modelsrc
and your Default Material Path should be:
C:\Program Files (x86)Steam\steamapps\mad21sun\sourcesdk_content\cstrike\materialsrc
Those values, once set, do not change between sessions unless you change the mod you are working on.
In the Model & Basic QC rollout, you will enter the name of the folder where your model is going to go starting from the current model folder of your mod. In the example, if you have a folder called "thisProject" inside of your modelsrc folder where the model will go, then you will just enter thisProject (as you did in the screen shot). You will also need to make sure that there is a folder called thisProject inside the model folder of your mod (in Counter-Strike Source models as opposed to the SDK modelsrc).
Again, in the Settings your Default Model Path should be just to the modelsrc folder... so in your screen it should say:
C:\Program Files (x86)Steam\steamapps\mad21sun\sourcesdk_content\cstrike\modelsrc
and your Default Material Path should be:
C:\Program Files (x86)Steam\steamapps\mad21sun\sourcesdk_content\cstrike\materialsrc
Those values, once set, do not change between sessions unless you change the mod you are working on.
In the Model & Basic QC rollout, you will enter the name of the folder where your model is going to go starting from the current model folder of your mod. In the example, if you have a folder called "thisProject" inside of your modelsrc folder where the model will go, then you will just enter thisProject (as you did in the screen shot). You will also need to make sure that there is a folder called thisProject inside the model folder of your mod (in Counter-Strike Source models as opposed to the SDK modelsrc).