The issues with your Forrest River 42DL RV roller shades—one not catching to stay down and the other not retracting—are usually caused by problems with the internal spring mechanism or clutch. First, try manually re-tensioning the shades by removing them from the brackets, rolling the fabric up by hand several times, then reinstalling and testing. Ensure the shades are mounted level and brackets are secure. If the shade still won’t catch or retract properly, the internal spring may be worn out or broken. In this case, replacing the spring assembly is recommended. For many Valu-Line and OEM RV roller shades, a 3/4" replacement spring is commonly used and includes the clutch mechanism. You can find these replacement springs suitable for your model on ElkhartRVParts.com. Proper spring replacement should restore the slow-rise and tension functions of your roller shades.