Die Antenne Die

[Akula4745]

Ok, I need help with this one...

Surfaced - no antenna. Submerge to periscope depth and the antenna emerges and extends to full height. Go below 22 meters and the antenna retracts. I cannot get the antenna down for periscope attacks... I have to maintain depth at 20+ meters and then surface at exactly the right moment to fire my fish. The bubble trail this antenna leaves is a dead giveaway!

How do I make the dang thing go down? Keyboard control? Spring 1940 - Southeastern Approaches mission. Mod list and pics below. Helfen sie bitte!

Generic Mod Enabler - v2.4.0.145
[C:\Ubisoft\Silent Hunter 5\MODS]

Grossdeutscher Rundfunk
Cerberus62 Historical Ship Equipment 1.3
nVidia missing lights
A Fistful of Emblems v1.51
FX_Update_0_0_19_ByTheDarkWraith
Ui-Boat V4.14
Real Environment - Revision_3
Radio_Messages_1_2_0_UI_Boat_v4_14
Environment Sounds
Less Annoying Stopwatch Ticking - LAST - v. 01.00 by AvM
sobers no footstep sound mod
U-Boat Watch Crew Routine SFX
German U-Boat Internal Routine SFX
OPEN HORIZONS II_full v1.7
stoianm EnvWeather V1 SH5
OH II Campaign Radio Messages v4
IO_StrategicMap_4_3_for_Ui-Boat V4.14
OH II Minefield map
No Damn Bubbles, No Damn Halo Mod
TDW_Mines_Subnets_Detectable_in_hydro (OH II v1.7)
Enhanced FunelSmoke1.2_by HanSolo78
sobers NO water drops V1
SH5Lifeboats_by_Rongel_TDW_stoianm_v2.1
Depth_Keeping_Problem_HB_2_0_0_TheDarkWraith
Accurate German Flags
Small_trees_SH5_V1
1000_Meter_Bearing_Plotter_byTheBeasts1.0
No Logo Intro Menu_Animation v. 01.00 by AvM
smaller flags for Warships 1_0b
sobers best ever waves V2 SH5
IRAI_0_0_30_ByTheDarkWraith
IRAI_0_0_30_No_Aircraft_Spotting_At_Depth

Picture 1 - submerging: antenna rises
Picture 2+3 - periscope depth