Only for TRS to XLR

I bought two VXLR to a Rode-stereo Mic stereo mini jack plug on a Y-cable (Wentronic Audio / Video cable, 2 x 3.5mm mono plug to 3.5mm stereo connector) 0.2m to two mono XLR inputs connect. Unfortunately this is not possible.
The VXLR is switched so that it passes only through a stereo mini jack which is introduced in mono signal on an XLR connector. Mono jack he does not understand and does not carry sound.
On Amazon.com is reported in reviews, one can the VXLR "outsmart" by not inserting the mono plug to the stop. But that does not result in secure audio track.
Qualitatively the VXLR is ok, so I do not want to devalue him big. But two points are deducted for missing connection information must be already.

Addendum: This it is: a "Audio adapter - RCA plug to 3.5mm jack - Mono by InLine" and a "XLR Adapter 3-pin XLR male to RCA-jack of Wentronic" per channel and the above Y-cable.