Talk to max at traction dynamics. He has some interesting things to say about the ohlins, and how they need to be set up. Here's a copy of the email he sent me.
What make and model of bike do you have? I can't tell you what spring you need until I know that.
Here is the deal with Ohlins....
They install SAME AS STOCK spring rates on their shocks, and then just adjust up or down. No testing, no track time, regardless of what they may say to the contrary. We log all stock spring rates of bikes here, and so we know what they are fitting to the shocks. Secondly, they install the springs with WAY too much preload. Even though you may see that the hydraulic adjuster (I am assuming you have the remote preload adjuster) appears to be "full soft", the spring is installed improperly by Ohlins, and has so much preload that the bike will not sag, sometimes not even with the rider on it!
So we need to reset the hydraulic collar (sometimes there is not room) or remove it and put an easy to adjust manual collar on. We have our own part that gets rid of the silly hydraulic gadget.
So, what you really most likely have is a spring that is Too Soft (believe it or not), but with so much initial pressure on it, that you will never get the bike setup right.
We can fix all of that for you.