I tried 6.0RC13, still has this problem.
It seems the two Realtek rtl8111D on Aopen 945GSE motherboard has no external eeprom chip( can't read eeprom data with pg8168.exe utilitis ), and the Realtek 8111D driver of RouterOS has some problem.
BTW: with RouterOS 5.24, the rtl8111D occasionally works abnormal after system reboot, it seems the driver of rtl8111D is ok, but no data transfer, windows system prompt cord unpluged.
I tried Openwrt, the two Realtek rtl8111D works all fine. the Openwrt use realtek 8169 driver.
this is the RTL8111D information under Openwrt
# uname -a
Linux OpenWrt 3.8.8 #1 Sat Apr 20 15:23:41 CST 2013 i686 GNU/Linux
# lspci -v
....
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
Subsystem: AOPEN Inc. Device 0700
Flags: bus master, fast devsel, latency 0, IRQ 43
I/O ports at dc00 [size=256]
Memory at fdeff000 (64-bit, prefetchable) [size=4K]
Memory at fdef8000 (64-bit, prefetchable) [size=16K]
Expansion ROM at feae0000 [disabled] [size=128K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 01
Capabilities: [ac] MSI-X: Enable- Count=4 Masked-
Capabilities: [cc] Vital Product Data
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
Kernel driver in use: r8169
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
Subsystem: AOPEN Inc. Device 0700
Flags: bus master, fast devsel, latency 0, IRQ 44
I/O ports at ec00 [size=256]
Memory at fdfff000 (64-bit, prefetchable) [size=4K]
Memory at fdff8000 (64-bit, prefetchable) [size=16K]
Expansion ROM at febe0000 [disabled] [size=128K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 01
Capabilities: [ac] MSI-X: Enable- Count=4 Masked-
Capabilities: [cc] Vital Product Data
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
Kernel driver in use: r8169