Problem installing drivers in Win2k

I recently did a reinstallation of Win2k Pro Svpk IV, but I am still getting a yellow exclamation mark indicating that something isn’t installed. My problem is that I don’t know what it is.

Modem is not connecting since reinstallation. However, the modem does query and this makes me believe the modem is good. The yellow exclamation mark indicates that a PCI Device needs to be installed. I have already installed what I believe to be the latest drivers for the motherboard, video coard, and Intel Chipset.

I am running an ASUS CUSL2-C motherboard with an Intel 815EP chipset. This is a Class III Pentium with 512mb of ram. Operating system is Win2k Pro Svpk IV.