Windows 2003 VMs cannot use the 10.1.x and above VMware Tools.
https://blogs.vmware.com/vsphere/2016/10/introducing-vmware-tools-10-1-10-0-12.html
The last version that you can use for WIndows 2003 is version 10.0.12 (10252).
https://my.vmware.com/web/vmware/details?downloadGroup=VMTOOLS10012&productId=491
Use the WinPreVista.iso.