Can this Character cast Spell Resistance?

[Halasham]

I'm playing a Sorcerer/Dragon Disciple and am 5 Sorc/6 DD for a total level of 11.
Because of Blood of Dragons my effective Sorc level for Draconic Bloodline is 11 which grants me the spell 'Spell Resistance', however it's a 5th level spell and I don't get 5th level spell slots yet.
It seems like there is something wrong for the character to have a spell but not be able to cast it because they don't possess an adequate slot.

Have I made an error somewhere? If not is there a ruling about how this situation is meant to be handled?

[Mysterious Stranger]

No, the character cannot cast the spell unless they have a way to regain the lost caster level for Dragon Disciple. The Feat Prestigious Caster (which has the feat Favored Prestige Class as a prerequisite) is the only way I know to do this. No magic item that I am aware of boosts your caster level for spells per day.

The loss of caster levels including spell per day is the price you pay for the extra power the prestige class gives you.